The reasons are that then the prenuptial love which the engaged couple had comes down into their hearts, and by being spread around in all directions into the body, leads to a feeling of the delights of marriage. This puts the idea of a festive occasion into their minds, and so far as is permissible and proper, their minds yield to festivities. To encourage this it is important that the festivities of their minds are shared, and so they themselves are introduced to the joys of conjugial love.